/Engine/Source/Editor/GraphEditor/Public/GraphActionNode.h
Looks through this node's Actions array, and returns the first valid action it finds.
This node's first valid action (will be an empty pointer if this is not an action node).
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FEdGraphSchemaAction](API\Runtime\Engine\EdGraph\FEdGraphSchemaAction) > GetPrimaryAction() const